Apparatus for use in the wet spinning of artificial threads



Dec. 1, 1959 R. DOMKE ETAL 2,914,803

APPARATUS FOR USE m THE WET SPINNING OF ARTIFICIAL THREADS Filed May 12, 1958 s Sheets-Sheet 1 y n g h )W ttorneys Dec. 1, 1959 R. DOMKE ETAL 2,914,803

APPARATUS FOR USE IN THE WET SPINNING 0F ARTIFICIAL THREADS Filed May 12, 1958 3 Sheets-Sheet 2 Inventors R/um RD Won HE W! gin 1 E/KERHAMV y Z g I W W Attorneys Filed May 12, 1958 1959 R. DOMKE ETAL 2,914,803

APPARATUS FOR USE IN THE WET SPINNING OF ARTIFICIAL THREADS 3 Sheets-Sheet 3 m 20 In F 0k 7 L Inventors Burl/m1) Down; WILHELH E/KERHANA/ mmiimm W A ttorneys we H r I,

APPARATUS FOR USE IN THE WET SPINNING or ARTIFICIALTHREADS Application May 12, 1958, Serial No. 734,549

Claims priority, application Germany June 6, 1957 Claims. (Cl. 18-8) This invention relates to an apparatus which enables the spinning nozzle to be changed without interrupting the flow of the spinning bath liquid when carrying out a wet spinning process in a vertical or inclined tube in which the spun material travels upwardly from below.

It is known to arrange the spinning nozzle at the end of a tube and to cause the spinning bath liquid to pass through the tube in the direction of travel of the threads. When the tube is arranged horizontally, the spinning bath liquid is usually allowed to flow from a tank or channel through the tube in front of which the spinning nozzle is arranged, so that at the beginning of thread formation the spinning bath liquid carries the thread with it and threads having improved properties are obtained owing to the favourable direction of flow of the spinning liquid. In this case the immersion of the nozzle with the inlet for the spinning liquid in the spinning bath and the removal of the nozzle, for example when the nozzle has to be changed, gives rise to no difficulty. Usually, there are used swingable spinning pipes which are also usual when spinning without a tube. Difficulties, however, occur when the spinning nozzle has to be changed if the tube is arranged vertically or at an angle to the horizontal with the spinning bath liquid flowing upwardly through it. These difi'lculties are, for example, that the nozzle can only be changed after the supply of spinning bath liquid has been cut on and the spinning chamber has been emptied.

It has now been found that the above-mentioned difficulties can be obviated and the wet spinning of artificial silk in tubes can be carried out in a more simple and certain manner when, for changing the spinning nozzle, the apparatus of the invention is used. According to the invention, the spinning nozzle is arranged on a movable member in such a way that, by displacing or rotating this member, it is possible to remove the nozzle for cleaning purposes or for changing it, without interfering with the flow of spinning bath liquid and its sealing towards the outside.

In order that the invention may be readily understood and carried into effect, the invention is illustrated, by way of example, in the accompanying drawings, in which Fig. l .is a vertical section through one'form of the apparatus;

Fig. la is a section through part of the apparatus of Fig. 1 showing the nozzle-carrying member displaced from its operative position;

Fig. 2 is a vertical section through another form of the apparatus;

Fig. 2a is an end elevation of part of Fig. 2;

Fig. 3 is a view partly in section of an apparatus having a rotatable nozzle-carrying member;

Fig. 4 is a section at right angles to Fig. 3, and

Fig. 5 is a view similar to Fig. 4, showing the nozzlecarrying member displaced from its operative position.

Referring to Figs. 1 and la of the drawings the spinning bath liquid enters at 1, passes through a chamber 25 and flows through the pipe 3 in the direction in which the spun threads emerge, that is to say from below upwardly. The spinning nozzle 5 is ,fixed in a cylindrical nozzle carrier 7 by means ,of a threaded ring 8 and is sealed by sealing rings 9. An elastic inlet tube 6 for the spinning liquid is also sealed in the nozzle carrier 7. The nozzle carrier 7 is sealed to prevent outflow of the spinning bath liquid by the stufiing boxes 16, in order to enable the nozzle to be changed without interrupting the flow of the spinning bath liquid. The nozzle carrier 7 is prevented from rotating by a pin 23 which engages in a groove 24. The movement of the nozzle carrier 7 in an axial direction is limited by a stop 26, wherebythe accurate positioning of the nozzle is ensured. V

Fig. 2 illustrates an apparatus of which the principle is the same as that of Fig. 1, but the nozzle carrier conwardly and then flows upwardly through the tube 3 nozzle carrier.

, ning position.

until it runs away at 4. The nozzle 5 and the elastic tube 6 for the spinning liquid are fixed in the cylindrical nozzle carrier 7, the nozzle being fixed by means of the threaded ring 8 and sealed by the sealing discs 9. The nozzle carrier 7 is centered and fixed in a cylindrical sliding member 10 which has the same diameter as the The two parts 7 and 10 are mounted in a casing 18. By means of a lever 11 pivoted on a pin 24 and two links 12 (Fig. 2a) which are connected to a pin 13 the two cylindrical parts 7 and 10, which are connected together, can be moved backwards and forwards. When the lever is in the position illustrated in Fig. 2, the sliding member and of the carrier, which are screwed together to form a unit, are in the position which is maintained during the spinning. When the lever is swung into the position illustrated in dotted lines in Fig. 2 the nozzle carrier 7 is pushed out of the casing 18 and the sliding member 10 connected to it takes its place. After this, the nozzle carrier 7 can be released by turning the knurled knob 14 to which a threaded bolt 15, which is screwed into the nozzle carrier 7, is fixed, and can be withdrawn for the purpose of changing the nozzle or the like. The nozzle carrier 7 and the sliding member 10 are sealed to prevent escape of the spinning bath liquid by the stufiing box 16, so that the nozzle can be changed without interrupting the flow of the spinning bath liquid. The position of the nozzle relative to the spinning tube in the axial direction is fixed by the throw of the lever 11. The nozzle carrier is prevented from rotating relative to the sliding member by a pin 17 which slides in a groove in the sliding member 10. The sliding member itself can make no movement because this is prevented by the pin 13, the links 12 and the lever 11, so that the same position of the nozzle both in axial and radial direction is ensured.

Whereas in the apparatus shown in Figs. 1 and 2 it is possible to remove the nozzle after axial displacement of the nozzle carrier without interfering with the flow of the spinning bath liquid, this can be done in the form of construction illustrated in Fig. 3 by rotating the nozzle carrier 19 which, in this case, is similar to the plug of a stopcock. In Fig. 4, the nozzle is shown in the spin- The connection 20 for the spinning bath liquid is connected to the casing 21 near the lower end of the tube. Fig. 5 shows the nozzle in the disconnected position in which it is possible to remove the nozzle by releasing the screw connection 22 without interfering with the flow of the s inning bath liquid.

The spinning bath liquid can be allowed to flow hot, if necessary, by screwing-in a member which is similar to the nozzle carrier and is provided with an outlet cock or valve.

We claim:

1. In an apparatus for the wet spinning of artificial threads comprising a single chamber provided with an orifice in the lower portion thereof, means for introducing a spinning solution into said chamber through said orifice, and means for introducing coagulating liquid into said chamber above said orifice, the improvement which comprises a spinning nozzle removably mounted in a carrier member provided with a closure surface adjacent said nozzle, said carrier member being movable between a position in which said spinning nozzle is athwart said orifice so that spinning solution passes upwardly therethrough into said chamber, and a position in which said nozzle is displaced away from said orifice to permit its ready removal from said carrier and in which said closure surface is athwart said orifice and closes it to prevent said coagulating fluid from falling therethrough.

2. Apparatus as claimed in claim 1 in which said carrier member is elongated and slidable along its longitudinal axis in a direction parallel to the plane in which said orifice lies. a

3. Apparatus as claimed in claim 1 which said orifice is in the bottom of said chamber.

4. Apparatus as claimed in claim 1 in which said carrier member has an at least part cylindrical surface of which said closure surface forms part and in which said nozzle is mounted, and said carrier member is provided with means for turning it about the axis of said cylindrical surface.

5. Apparatus as claimed in claim 1 in which said carrier member moves through stufling boxes which prevent leakage of coagulating solution between said chamber r and carrier member.

References Cited in the file of this patent -UNITED STATES PATENTS 2,789,315 Pistor et a1. Apr. 23, 1957 FOREIGN PATENTS 1,079,857 France Dec. 3, 1954 

1. IN A APPARATUS FOR THE WET SPINNING OF ARTIFICIAL THREADS COMPRISIING A SINGLE CHAMBER PROVIDED WITH AN ORIFICE IN THE LOWER PORTION THEREOF, MEANS FOR INTRODUCING A SPINNING SOLUTION INTO SAID CHAMBER THROUGH SAID ORIFICE, AND MEANS FOR INTRODUCING COAGULATING LIQUID INTO SAID CHAMBER ABOVE SAID ORIFICE, THE IMPROVEMENT WHICH COMPRISES A SPINNING NOZZLE REMOVABLY MOUNTED IN A CARRIER MEMBER PROVIDED WITH A CLOSURE SURFACE ADJACENT SAID NOZZLE, SAID CARRIER MEMBER BEING MOVABLE BETWEEN A POSITION IN WHICH SAID SPINNING NOZZLE IS ATHWART SAID ORIFICE SO THAT SPINNING SOLUTION PASSES 